adding cat() and normalizing select() output to always be iterable (whether nest=True or False)
got integration tests working with new result iteration
some doc changes
Add more documentation to liblmdb client
Name the nested table more properly to avoid collision
Fix string format of table name
Merge branch 'master' into develop
Optimize PartitionDB and CountDB for get_neighbours
Fix the slowness of bitmap index checking
Bump version number to 0.2.1